Program crash when scrolling ALV table

[muffy13]

Hello, I am learning ABAP and for a few days, Im stuck in a problem of program crash when scrolling through ALV table. Everything worked perfectly when I used REUSE_ALV_GRID_DISPLAY and for field catalog SLIS_FIELDCAT_ALV. But then I had to switch to CL_GUI_ALV_GRID and LVC_S_LAYO with related changes. After that, scrolling crash problem appeared. No big data, just normal IDs, names etc. and max amount of results should be 513 rows and 3 columns. Interesting thing is, the more columns i add, the earlier i get the crash in scrolling. Dump text is "Field symbol has not been assigned yet."

Did someone faced similar issue and how did you fixed this? 😞 Thank you

This is ALV part of the code. Filling of the table etc. is right above this:

 DATA: lo_alv type ref to cl_gui_alv_grid,
  
 lo_custom_container TYPE REF TO cl_gui_custom_container,
  
 lt_fcat TYPE lvc_t_fcat,
  
 ls_fcat TYPE lvc_s_fcat,
  
 ls_layout TYPE lvc_s_layo.
  
 IF lo_custom_container IS INITIAL. "neboli pokud objekt Kontejner neexistuje...
  
 CREATE OBJECT lo_custom_container "...tak ho vytvoř
  
 EXPORTING
  
* parent =
  
 container_name = 'CUSTOM_CONTAINER'
  
* style =
  
* lifetime = lifetime_default
  
* repid =
  
* dynnr =
  
* no_autodef_progid_dynnr =
  
 EXCEPTIONS
  
 cntl_error = 1
  
 cntl_system_error = 2
  
 create_error = 3
  
 lifetime_error = 4
  
 lifetime_dynpro_dynpro_link = 5
  
 others = 6
  
 .
  
 IF sy-subrc <> 0.
  
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
  
* WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
  
 ENDIF.
  
 endif.
  
 CREATE OBJECT lo_alv
  
 EXPORTING
  
 i_parent = lo_custom_container.
  
* ls_layout-col_opt = 'X'.
  
* ls_layout-stylefname = 'STYLE'.
  

* DATA lt_fcat TYPE slis_t_fieldcat_alv.
  
* DATA ls_fcat TYPE slis_fieldcat_alv.
  
 clear ls_fcat.
  
 ls_fcat-col_pos = '1'.
  
 ls_fcat-fieldname = 'object_id'.
  
 ls_fcat-coltext = 'Číslo hlášení'.
  
 append ls_fcat to lt_fcat.
  
 clear ls_fcat.
  
 ls_fcat-col_pos = '2'.
  
 ls_fcat-fieldname = 'description'.
  
 " ls_fcat-seltext_L = 'Popis hlášení'.
  
 ls_fcat-coltext = 'Popis hlášení'.
  
 append ls_fcat to lt_fcat.
  
 clear ls_fcat.
  
 ls_fcat-col_pos = '3'.
  
 ls_fcat-fieldname = 'created_by'.
  
 ls_fcat-coltext = 'Uživatel'.
  
 append ls_fcat to lt_fcat.
  
 " DATA: lo_container TYPE REF TO cl_gui_container. 
  
 CALL METHOD lo_alv->SET_TABLE_FOR_FIRST_DISPLAY
  
 EXPORTING
  
 is_layout = ls_layout
  
 CHANGING
  
 it_outtab = lt_crmd_orderadm_h
  
 it_fieldcatalog = lt_fcat
  
 EXCEPTIONS
  
 invalid_parameter_combination = 1
  
 program_error = 2
  
 too_many_lines = 3
  
 OTHERS = 4.
  
*** call FUNCTION 'REUSE_ALV_GRID_DISPLAY'
  
*** exporting
  
**** I_INTERFACE_CHECK = SPACE
  
**** I_BYPASSING_BUFFER = SPACE
  
**** I_BUFFER_ACTIVE = SPACE
  
**** I_CALLBACK_PROGRAM = SPACE
  
**** I_CALLBACK_PF_STATUS_SET = SPACE
  
**** I_CALLBACK_USER_COMMAND = SPACE
  
**** I_CALLBACK_TOP_OF_PAGE = SPACE
  
**** I_CALLBACK_HTML_TOP_OF_PAGE = SPACE
  
**** I_CALLBACK_HTML_END_OF_LIST = SPACE
  
**** I_STRUCTURE_NAME =
  
**** I_BACKGROUND_ID =
  
**** I_GRID_TITLE =
  
**** I_GRID_SETTINGS =
  
**** IS_LAYOUT =
  
*** IT_FIELDCAT = lt_fcat
  
**** IT_EXCLUDING =
  
**** IT_SPECIAL_GROUPS =
  
**** IT_SORT =
  
**** IT_FILTER =
  
**** IS_SEL_HIDE =
  
**** I_DEFAULT = 'X'
  
**** I_SAVE = SPACE
  
**** IS_VARIANT =
  
**** IT_EVENTS =
  
**** IT_EVENT_EXIT =
  
**** IS_PRINT =
  
**** IS_REPREP_ID =
  
**** I_SCREEN_START_COLUMN = 0
  
**** I_SCREEN_START_LINE = 0
  
**** I_SCREEN_END_COLUMN = 0
  
**** I_SCREEN_END_LINE = 0
  
**** I_HTML_HEIGHT_TOP = 0
  
**** I_HTML_HEIGHT_END = 0
  
**** IT_ALV_GRAPHICS =
  
**** IT_HYPERLINK =
  
**** IT_ADD_FIELDCAT =
  
**** IT_EXCEPT_QINFO =
  
**** IR_SALV_FULLSCREEN_ADAPTER =
  
**** importing
  
**** E_EXIT_CAUSED_BY_CALLER =
  
**** ES_EXIT_CAUSED_BY_USER =
  
*** tables
  
*** T_OUTTAB = lt_crmd_orderadm_h
  
**** exceptions
  
**** PROGRAM_ERROR = 1
  
**** OTHERS = 2
  
*** .
  
*** if sy-subrc <> 0.
  
**** message id sy-msgid type sy-msgty number sy-msgno
  
**** with sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
  
*** "break kalivodova.
  
*** endif.

[Sandra_Rossi]

Please edit your question (Actions>Edit), select your code and press the button [CODE], which makes the code appear colored/indented, it'll be easier for people to look at it. Thanks!

[Sandra_Rossi]

Crash when scrolling ALV makes me immediately think that you have passed a LOCAL internal table to the ALV:

CALL METHOD lo_alv->SET_TABLE_FOR_FIRST_DISPLAY
  EXPORTING
    is_layout = ls_layout
  CHANGING
    it_outtab = lt_crmd_orderadm_h
...

i.e. the argument of IT_OUTTAB should not be a local internal table.

Only global variables or public attributes of alive instances can work with ALV (especially when scrolling but for other features too).

[Eduardo-CE]

Or perhaps a field name on the field cat is different from the table.

[muffy13]

Thank you so much, you were right! ❤️